JP2015060220A5

JP2015060220A5 -

Info

Publication number: JP2015060220A5
Application number: JP2014179309A
Authority: JP
Filing date: 2014-09-03
Publication date: 2017-11-30
Anticipated expiration: 2034-09-03

Claims

A process for producing a toner composition comprising:
Mixing the resin, colorant, and wax together to form toner particles;
Mixing the first inorganic fine powder and silicone oil together in a first mixing step to form an oil treated inorganic fine powder;
In the second mixing step, the oil-treated inorganic fine powder is added to the toner particles without heat treatment to adhere the silicone oil to the inorganic fine powder, and the oil-treated inorganic fine powder and the toner particles are mixed together. Forming final toner particles;
Including the process.

The process of claim 1, wherein a second inorganic fine powder is added to the first inorganic fine powder and silicone oil in the second mixing step.

The process of claim 1, wherein the final toner particles are further screened to exclude coarse particles.

The process of claim 1, wherein the final toner particles have a roundness greater than 0.975.

The process of claim 1, wherein the final toner particles have an average particle size of 4 to 9 μm.

The process according to claim 2, wherein the first inorganic fine powder and the second inorganic fine powder are the same.

The oil-treated inorganic fine powder is silica, alumina, titanium oxide, barium titanate, magnesium titanate, calcium titanate, strontium titanate, zinc oxide, silica sand, clay, mica, wollastonite, diatomaceous earth, oxidized 2. The method of claim 1, selected from the group consisting of chromium, cerium oxide, red iron oxide, antimony trioxide, magnesium oxide, zirconium oxide, barium sulfate, barium carbonate, calcium carbonate, silicon carbide, silicon nitride, and mixtures thereof. The process described.

The silicone oil is dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, alkyl modified silicone oil, chloroalkyl modified silicone oil, chlorophenyl modified silicone oil, fatty acid modified silicone oil, polyether modified silicone oil, alkoxy modified silicone. The process of claim 1 selected from the group consisting of oil, carbinol modified silicone oil, amino modified silicone oil, fluorine modified silicone oil, and mixtures thereof.

The process of claim 1, wherein the silicone oil has a viscosity at room temperature of from about 10 to about 1,000 centistokes.

The process of claim 1, wherein the silicone oil is present in the toner composition in an amount from 500 to 3500 parts per million (ppm).

A process for producing a toner composition comprising:
Mixing the resin, colorant, and wax together to form toner particles;
The first inorganic fine powder and the silicone oil are added to the toner particles without heat treatment for adhering the silicone oil to the first inorganic fine powder, and the first inorganic fine powder, the silicone oil, and the toner Mixing the particles together to form the final toner particles;
Including the process.

Toner particles comprising a resin, a colorant, and a wax;
An additive comprising a first inorganic fine powder and silicone oil,
Without the heat treatment for adhering the silicone oil to the first inorganic fine powder, the first inorganic fine powder and the silicone oil are directly mixed with the toner particles to form final toner particles.
Toner composition.

The toner composition of claim 12, wherein the roundness of the final toner particles is greater than 0.975.

The toner composition of claim 12, wherein the final toner particles have an average particle size of about 4 to about 9 μm.

The first inorganic fine powder is silica, alumina, titanium oxide, barium titanate, magnesium titanate, calcium titanate, strontium titanate, zinc oxide, silica sand, clay, mica, wollastonite, diatomaceous earth, oxidized Selected from the group consisting of chromium, cerium oxide, red iron oxide, antimony trioxide, magnesium oxide, zirconium oxide, barium sulfate, barium carbonate, calcium carbonate, silicon carbide, silicon nitride, and mixtures thereof, the silicone oil is Dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, alkyl modified silicone oil, chloroalkyl modified silicone oil, chlorophenyl modified silicone oil, fatty acid modified silicone oil, polyether Decorative silicone oil, alkoxy-modified silicone oil, carbinol modified silicone oil, amino-modified silicone oil, fluorine modified silicone oil, and is selected from the group consisting of mixtures, the toner composition of claim 12.

The toner composition of claim 12, wherein the silicone oil has a viscosity at room temperature of from about 10 to about 1,000 centistokes.

The toner composition according to claim 12, wherein the silicone oil is present in the toner composition in an amount of 500 to 3500 parts per million (ppm).

An electrostatic latent image support member for holding the electrostatic latent image thereon;
A developing assembly for developing the electrostatic latent image held on the electrostatic latent image support member, the self-cleaning toner composition for developing the electrostatic latent image, and the toner for holding the self-cleaning toner composition A container and the self-cleaning toner composition held in the toner container and transporting the self-cleaning toner composition to an area on the electrostatic latent image support member where the electrostatic latent image is developed. The developer assembly including a toner conveying member for transport;
A cleaning unit for cleaning the surface of the electrostatic latent image support member;
An additive comprising a first inorganic fine powder and silicone oil;
An image forming apparatus comprising:
The self-cleaning toner composition comprises final toner particles;
The final toner particles include a resin, a colorant, and a wax, and the first inorganic fine powder and the silicone oil are combined with the toner particles without performing a heat treatment for attaching the silicone oil to the first inorganic fine powder. Directly mixed and formed,
Image forming apparatus.

The image forming apparatus according to claim 18, wherein the cleaning unit includes a cleaning blade.

The image forming apparatus according to claim 19, wherein the cleaning blade does not wear even when the final toner particles are cleaned from the electrostatic latent image supporting member after printing 20,000 pages.